Plaque in Chicago marking the creation of the four time zones of the continental US in 1883
Colorized 1913 time zone map of the United States, showing boundaries very different from today
Map of U.S. time zones during between April 2, 2006, and March 11, 2007. The current situation is different only in that six Indiana counties have since been moved from the Central time zone to the Eastern time zone.

The history of standard time in the United States began November 18, 1883, when United States and Canadian railroads instituted standard time in time zones. Before then, time of day was a local matter, and most cities and towns used some form of local solar time, maintained by some well-known clock (for example, on a church steeple or in a jeweler's window). The new standard time system was not immediately embraced by all.

Use of standard time gradually increased because of its obvious practical advantages for communication and travel. Standard time in time zones was not established in U.S. law until the Standard Time Act of 1918 of March 19, 1918, also known as the Calder Act (15 USC 260).[1][2] The act also established daylight saving time, itself a contentious idea.

Daylight saving time was repealed in 1919, but standard time in time zones remained in law, with the Interstate Commerce Commission (ICC) having the authority over time zone boundaries. Daylight time became a local matter. It was re-established nationally early in World War II, and was continuously observed until the end of the war.

After the war its use varied among states and localities. The Uniform Time Act of 1966 provided standardization in the dates of beginning and end of daylight time in the U.S. but allowed for local exemptions from its observance. The act also continued the authority of the ICC over time zone boundaries. In subsequent years, the United States Congress transferred the authority over time zones to the U.S. Department of Transportation (DOT).

Time zone boundaries have changed greatly since their original introduction and changes still occasionally occur. DOT issues press releases when these changes are made. Generally, time zone boundaries have tended to shift westward. Places on the eastern edge of a time zone can effectively move sunset an hour later (by the clock) by shifting to the time zone immediately to their east.

If they do so, the boundary of that zone is locally shifted to the west; the accumulation of such changes results in the long-term westward trend. The process is not inexorable, however, since the late sunrises experienced by such places during the winter may be regarded as too undesirable. Furthermore, under the law, the principal standard for deciding on a time zone change is the "convenience of commerce". Proposed time zone changes have been both approved and rejected based on this criterion, although most such proposals have been accepted.

Railway time

Map of 1884/5 explaining the time zones used on American railway lines.
This cartoon appeared on the cover of Life magazine, January 3, 1884

One of the first reported incidents which brought about a change in how time was organized on railways in the United States occurred in New England in August 1853. Two trains heading towards each other on the same track collided as the train guards had different times set on their watches, resulting in the death of 14 passengers. Railway schedules were coordinated in New England shortly after this incident[3] Numerous other collisions led to the setting up of the General Time Convention, a committee of railway companies to agree on scheduling.[4]

In 1870 Charles F. Dowd, who was unconnected with the railway movement or civil authorities, proposed A System of National Times for Railroads, which involved a single time for railways but the keeping of local times for towns. Although this did not find favor with railway managers, in 1881 they agreed for the idea to be investigated by William Frederick Allen, Secretary of the General Time Convention and Managing Editor of the Travellers' Official Guide to the Railways. He proposed replacing the 50 different railway times with five time zones. He eventually persuaded the railway managers and the politicians running the cities that had several railway stations that it was in their interests to speedily adopt his simpler proposals, which aligned the zones with cities' railroad stations. In doing so, they would pre-empt the imposition of more costly and cumbersome arrangements by different state legislators and the naval authorities, both of whom favored retention of local times.[4] On 11 October 1883, a convention of railroad executives met in Chicago at the General Time Convention (latter renamed the American Railway Association) and agreed to the implementation of five time zones in North America, using as a basis Greenwich Mean Time.[5][6]

Right to the end there was opposition expressed by many smaller towns and cities to the imposition of railway time. For example, in Indianapolis the report in the daily Sentinel for 17 November 1883 protested that people would have to "eat sleep work ... and marry by railroad time".[7] However, with the support of nearly all railway companies, most cities and influential observatories such as Yale and Harvard, this collaborative approach led to standard railway time being introduced at noon on 18 November 1883. This consensus held and was incorporated into federal law only in 1918.[4][8][9]

Standard time and war time

Daylight saving time was established by the Standard Time Act of 1918. The Act was intended to save electricity for seven months of the year, during World War I.[10] DST was repealed in 1919 over a presidential veto,[11] but standard time in time zones remained in law, with the Interstate Commerce Commission (ICC) having the authority over time zone boundaries. Daylight time became a local matter.

During World War II, Congress enacted the War Time Act (56 Stat. 9) on January 20, 1942. Year-round DST was reinstated in the United States on February 9, 1942, again as a wartime measure to conserve energy resources.[12] This remained in effect until after the end of the war. After V-J Day, the word 'war' and the middle letter 'W' were changed to 'prevailing' and 'P', but the advance in the clock was not reverted.

The Amendment to the War Time Act (59 Stat. 537), enacted September 25, 1945, ended DST as of September 30, 1945. During this period, the official designation War Time was used for year-round DST. For example, Eastern War Time (EWT) would be the equivalent of Eastern Daylight Time during this period.

Local-option daylight saving time

Time zone map of 1948. The borders between zones are slightly different to those of today.

From 1945 to 1966 U.S. federal law did not address DST. States and cities were free to observe DST or not, and most places that did observe DST did so from the last Sunday in April to the last Sunday in September. In the mid-1950s many areas in the northeastern United States began extending DST to the last Sunday in October. The lack of standardization led to a patchwork where some areas observed DST while adjacent areas did not, and it was not unheard of to have to reset a clock several times during a short trip (e.g., bus drivers operating on West Virginia Route 2 between Moundsville, West Virginia, and Steubenville, Ohio had to reset their watches seven times over 35 miles).[13]

In summer 1960 April–October Daylight Time was nearly universal in Pennsylvania, Maryland, Delaware and states east and north of there. In Minnesota, Iowa, Missouri, Kentucky and Virginia and states north and east of there, some areas had it and some did not. Except for California and Nevada, which had April-Sept Daylight Time, 99% of the rest of the country used Standard Time year-round. (The Official Guide says "State law prohibits the observance of "Daylight Saving" time in Kentucky but Anchorage, Louisville and Shelbyville will advance their clocks one hour from Central Standard time for the period April 24 to October 29, inclusive.")

In the middle 1960s the airline and other transportation industries lobbied for uniformity of Daylight dates in the United States.

Unified daylight saving time

The U.S. federal Uniform Time Act became law on April 13, 1966, and it mandated that DST begin nationwide on the last Sunday in April and end on the last Sunday in October, effective in 1967. The act explicitly preempted all previously enacted state laws related to the beginning and ending of DST effective in 1966. Any state that wanted to be exempt from DST could do so by passing a state law, provided that it exempted the entire state, and Alaska, Arizona, Hawaii, Indiana, and Michigan chose to do so. However, Alaska, Indiana, and Michigan subsequently chose to observe DST. The law was amended in 1972 to permit states that straddle a time zone boundary to exempt the entire area of the state lying in one time zone. Indiana chose to exempt the portion of the state lying in the Eastern Time Zone; however, that exemption was eliminated in 2006 and the entire state of Indiana now observes DST, leaving Arizona (with the exception of the Navajo Nation) and Hawaii as the only two states not to observe DST. On July 8, 1986, President Ronald Reagan signed the Federal Fire Prevention and Control Act of 1986 into law that contained a daylight saving rider authored by Senator Slade Gorton (R-WA).[10] The starting date of DST was amended to the first Sunday in April effective in 1987. DST continued to end on the last Sunday in October. While the states retain the capability to exempt themselves from DST, they are forbidden by the 1966 federal law (15 USC 260a(b))[14] from increasing a state's time spent on DST, unless the United States Congress does this for the entire nation.

Permanent daylight saving time

In response to the 1973 energy crisis, DST in the United States began earlier in both 1974 and 1975, commencing on the first Sunday in January (January 6) in the former year and the last Sunday in February (February 23) in the latter. The extension of daylight saving time was not continued due to public opposition to late sunrise times during the winter months. In 1976, the United States reverted to the schedule set in the Uniform Time Act.[15]

Daylight saving time extensions

Starting April 5, 1987, DST was extended three weeks, by moving its start date up from the last Sunday of April to the first Sunday. The change was introduced by Federal Fire Prevention and Control Act of 1986. Starting March 11, 2007, DST was extended another four to five weeks, by moving both its start date to the second Sunday of March and its end date to the first Sunday of November. This time the change was introduced by Representatives Fred Upton (R-MI) and Edward Markey (D-MA) and added to the Energy Policy Act of 2005; the House had originally approved a motion that would have extended DST even farther from the first Sunday in March to the last Sunday in November, but Senators Jeff Bingaman (D-NM) and Pete Domenici (R-NM) agreed to scale back the proposal in conference committee due to complaints from farmers and the airline industry. Proponents claimed that the extension would save "the equivalent of" 10,000 barrels (1,600 m3) of oil per day, but this figure was based on U.S. Department of Energy information from the 1970s, the accuracy and relevance of which the DoE no longer stands by. Later studies by the U.S. Department of Energy and the California Energy Commission have predicted much smaller energy benefits.[16] There is very little recent research on what the actual positive effects, if any, might be.

Since DST moves sunrise one hour later by the clock, late sunrise times become a problem when DST is observed either too far before the vernal equinox or too far after the autumnal equinox. Because of this, the extension was greeted with criticism by those concerned for the safety of children who would have been forced to travel to school before sunrise, especially in the month of March. In addition, the airline industry was especially concerned if DST were to be extended through to the last Sunday in November, as this is very often the Sunday after Thanksgiving (except for 2013, 2019, 2024, and 2030), as this is always the Sunday after the fourth Friday in November, and Thanksgiving is on the fourth Thursday in November. This is one of the busiest travel days at American airports, and could have resulted in much havoc among travelers who forgot that the clocks were changing that day.

If the original proposal to extend DST through the last Sunday in November had been adopted, the entire United States, with the exception of the states that exempted themselves, would have experienced the latest sunrises of the year during the month of November, which would have approached the extremely late sunrise times when DST went into effect on January 6, 1974, due to the 1973 energy crisis creeping after 9 am in places like New Salem, North Dakota at the northwestern edges of time zones.

Start and end dates of daylight saving time in the United States

Key to colors
future date
second Sunday March, first Sunday November
first Sunday April, last Sunday October
last Sunday April, last Sunday October
YearDST begins (local)DST ends (local)Notes
2026 Sun March 8 02:00Sun November 1 02:00
2025 Sun March 9 02:00Sun November 2 02:00
2024 Sun March 10 02:00Sun November 3 02:00
2023 Sun March 12 02:00Sun November 5 02:00
2022 Sun March 13 02:00Sun November 6 02:00
2021 Sun March 14 02:00Sun November 7 02:00
2020 Sun March 8 02:00Sun November 1 02:00
2019 Sun March 10 02:00Sun November 3 02:00
2018 Sun March 11 02:00Sun November 4 02:00
2017 Sun March 12 02:00Sun November 5 02:00
2016 Sun March 13 02:00Sun November 6 02:00
2015 Sun March 8 02:00Sun November 1 02:00
2014 Sun March 9 02:00Sun November 2 02:00
2013 Sun March 10 02:00Sun November 3 02:00
2012 Sun March 11 02:00Sun November 4 02:00
2011 Sun March 13 02:00Sun November 6 02:00
2010 Sun March 14 02:00Sun November 7 02:00
2009 Sun March 8 02:00Sun November 1 02:00
2008 Sun March 9 02:00Sun November 2 02:00
2007 Sun March 11 02:00Sun November 4 02:00Energy Policy Act of 2005
2006 Sun April 2 02:00Sun October 29 02:00All of Indiana now on DST
2005 Sun April 3 02:00Sun October 30 02:00
2004 Sun April 4 02:00Sun October 31 02:00
2003 Sun April 6 02:00Sun October 26 02:00
2002 Sun April 7 02:00Sun October 27 02:00
2001 Sun April 1 02:00Sun October 28 02:00
2000 Sun April 2 02:00Sun October 29 02:00
1999 Sun April 4 02:00Sun October 31 02:00
1998 Sun April 5 02:00Sun October 25 02:00
1997 Sun April 6 02:00Sun October 26 02:00
1996 Sun April 7 02:00Sun October 27 02:00
1995 Sun April 2 02:00Sun October 29 02:00
1994 Sun April 3 02:00Sun October 30 02:00
1993 Sun April 4 02:00Sun October 31 02:00
1992 Sun April 5 02:00Sun October 25 02:00
1991 Sun April 7 02:00Sun October 27 02:00
1990 Sun April 1 02:00Sun October 28 02:00
1989 Sun April 2 02:00Sun October 29 02:00
1988 Sun April 3 02:00Sun October 30 02:00
1987 Sun April 5 02:00Sun October 25 02:00Federal Fire Prevention and Control Act of 1986
1986 Sun April 27 02:00Sun October 26 02:00
1985 Sun April 28 02:00Sun October 27 02:00
1984 Sun April 29 02:00Sun October 28 02:00
1983 Sun April 24 02:00Sun October 30 02:00Alaska time zones changed Sun October 30 02:00
1982 Sun April 25 02:00Sun October 31 02:00
1981 Sun April 26 02:00Sun October 25 02:00
1980 Sun April 27 02:00Sun October 26 02:00
1979 Sun April 29 02:00Sun October 28 02:00
1978 Sun April 30 02:00Sun October 29 02:00
1977 Sun April 24 02:00Sun October 30 02:00
1976 Sun April 25 02:00Sun October 31 02:00
1975 Sun February 23 02:00Sun October 26 02:00Emergency Daylight Time Act
Michigan exempted, began DST Sun April 27 02:00
1974 Sun January 6 02:00Sun October 27 02:00Emergency Daylight Time Act
Southern Idaho and eastern Oregon (Mountain time zone)
began DST Sun February 3 02:00
1973 Sun April 29 02:00Sun October 28 02:00All of Michigan now on DST
1972 Sun April 30 02:00Sun October 29 02:00
1971 Sun April 25 02:00Sun October 31 02:00Indiana (Eastern time zone) opts out
1970 Sun April 26 02:00Sun October 25 02:00
1969 Sun April 27 02:00Sun October 26 02:00All of Alaska and Indiana now on DST
1968 Sun April 28 02:00Sun October 27 02:00Arizona and Michigan opt out
1967 Sun April 30 02:00Sun October 29 02:00Alaska, Hawaii, Indiana and territories opt out
1966 Sun April 24 02:00Sun October 30 02:00Uniform Time Act of 1966 required states that used DST in 1966
to conform to last Sunday in April to last Sunday in October
1946–65 Local decision, various dates
1945 Sun September 30 02:00War Time ends
1944 War Time all year
Arizona War Time not observed Sat January 1 02:00–Sat April 1 02:00
Arizona War Time ends Sat September 30 02:00[17]
1943 War Time all year
1942 Mon February 9 02:00War Time begins year round
War Time Act
1920–41 Local decision, various dates
1919 Sun March 30 02:00Sun October 26 02:00An Act For the repeal of the daylight-saving law
enacted August 20, 1919
1918 Sun March 31 02:00Sun October 27 02:00Standard Time Act of 1918

See also

Notes

  1. United States statutes at large: containing the laws and concurrent resolutions enacted during the second session of the one hundred fifth congress of the United States of America 1998 and proclamations. Government Printing Office. 1999. p. 599.
  2. History of Daylight Time in the U.S., United States Naval Observatory
  3. Smithsonian's NMAH - Anniversary Exhibition Press Release 1999 "Railway Accident and Standard Time in America" Archived 2011-06-30 at the Wayback Machine - Retrieved March 4
  4. 1 2 3 White Matthew, W - Wharton Business School, Univ of Pennsylvania - March 2005 "The Economics of Time Zones" Archived 2012-05-14 at the Wayback Machine - Retrieved March 7
  5. "Railroads standardize time; country follows − Everywhere West". Newberry Library. March 23, 2018. Retrieved March 23, 2018.
  6. "The New Railroad Time; Favorable Action of the Convention in Chicago. The New Standard Adopted by 78,000 Miles of Road and the Convention Selecting Nov. 18 for the Change". The New York Times. October 12, 1883.
  7. Ralph R. Hamerla, 2006.An American Scientist on the Research Frontier pp 96-7 - Retrieved March 4
  8. NY Times Archive - October 10, 1883 "Railway Time Belt William (Frederick) Allen" - Retrieved March 4
  9. Smithsonian's NMAH - Anniversary Exhibition Press Release 1999 "North American Standard Time introduced 1883" Archived 2011-06-30 at the Wayback Machine - Retrieved March 4
  10. 1 2 A Time-Change Timeline, National Public Radio, March 8, 2007
  11. An Act For the repeal of the daylight-saving law, Pub. L.Tooltip Public Law (United States) 66–40, 41 Stat. 280, enacted August 20, 1919
  12. 24/7: A Resource Guide to the Law of Time Standards" Archived 2006-06-18 at the Wayback Machine, June 3, 2002
  13. Daylight Saving Time: Early adoption in law
  14. 15 USC 260a
  15. Daylight Saving Time (Report). 5. Congressional Research Service. July 18, 2019. p. 23.
  16. Energy Concerns Push Clocks Forward this Weekend by Nell Boyce. Morning Edition, National Public Radio, 9 March 2007.
  17. "Daylight Saving Time in Arizona". Archived from the original on September 28, 2006. Retrieved December 2, 2006.

References

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